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Finding the Fourth Proportional to 331,245.30, 496,904.40 and 120,928.80

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Solution

The fourth proportional to 331,245.30, 496,904.40 and 120,928.80 is: 181,406.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,245.30 : 496,904.40 = 120,928.80 : x
  2. Step 2: Convert to fraction form
    331,245.30/496,904.40 = 120,928.80/x
  3. Step 3: Cross multiply
    331,245.30x = 496,904.40 × 120,928.80
  4. Step 4: Simplify right side
    331,245.30x = 60,090,052,806.72
  5. Step 5: Solve for x
    x = 60,090,052,806.72/331,245.30
  6. Step 6: Final answer
    x = 181,406.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.